You just open the radio to the logic board is exposed. Under the microprocessor
there is a number "1" printed on the board.
Below this number you see two
solder pads.
Just bridge these two pads together and you got 80 chs.

Simply solder a wire across them or you may only have to drag a bit of solder across them to bridge them.

Thats it, now your BC60XLT-1 is a 80 Channel Scanner.

More Details

Find the number "1" written in a circle on the board in the left bottom corner of the microprocessor.

With a good solder station (max 30W) and without static electricity bridge the pins at the right of the number.